Synthetic zeolites and other microporous oxide molecular …
Structure and Properties of Synthetic Molecular Sieves. Zeolites have the chemical formula M 2/n OAl 2 O 3 ⋅xSiO 2 ⋅yH 2 O, where the charge-balancing nonframework cation M has valence n, x is 2.0 or more, and y is the moles of water in the voids.